Pith Number

pith:PWAYIGZU

pith:2026:PWAYIGZUP26JKOFNRWH76HXI4K

not attested not anchored not stored refs resolved

Equilibrium figure of Haumea and possible detection by stellar occultation

C. Staelen, F. Chambat, J. C. Castillo-Rogez, N. Rambaux

Haumea's observed shape matches hydrostatic models near critical rotation that pinch and deviate up to 110 km from an ellipsoid.

arxiv:2603.11787 v2 · 2026-03-12 · astro-ph.EP

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\usepackage{pith}
\pithnumber{PWAYIGZUP26JKOFNRWH76HXI4K}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

Using the code BALEINES, which solves for the equilibrium figures of the boundaries between layers, we show that the hydrostatic models closest to the shape derived by stellar occultation approach a state of critical rotation, which translates into a pinched shape with large deviations from an ellipsoid (up to 110 km).

C2weakest assumption

The assumption of three specific interior model groups with a rocky core, an intermediate layer of suggested partial differentiation or organic matter, and a volatile-rich outer shell possibly containing porosity, combined with the premise that Haumea is in hydrostatic equilibrium.

C3one line summary

Hydrostatic equilibrium models of Haumea with layered interiors predict a pinched shape deviating up to 110 km from an ellipsoid, potentially detectable in the 2026 occultation.

References

23 extracted · 23 resolved · 0 Pith anchors

[1] 2024, Nature Communications, 15, 6202 2024

[2] Barr, A. C. & Schwamb, M. E. 2016, MNRAS, 460, 1542 Brozovi´c, M. & Jacobson, R. A. 2024, AJ, 167, 256 2016

[3] 2023, Journal of Geophys- ical Research: Planets, 128, e2022JE007432 2023

[4] 2023, A&A, 675, L2 2023

[5] Dunham, E. T., Desch, S. J., & Probst, L. 2019, ApJ, 877, 41 2019

Formal links

1 machine-checked theorem link

Receipt and verification

First computed	2026-05-27T14:06:41.508982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d81841b347ebc9538ad8d8fff1ee8e2af406d4e88fcfd86129c079204c783a1

Aliases

arxiv: 2603.11787 · arxiv_version: 2603.11787v2 · doi: 10.48550/arxiv.2603.11787 · pith_short_12: PWAYIGZUP26J · pith_short_16: PWAYIGZUP26JKOFN · pith_short_8: PWAYIGZU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/PWAYIGZUP26JKOFNRWH76HXI4K \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 7d81841b347ebc9538ad8d8fff1ee8e2af406d4e88fcfd86129c079204c783a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc8de52c8eafdbd0cc06d4f223de0da11248f557da27feae2acbbb968391f9fb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-03-12T10:50:44Z",
    "title_canon_sha256": "c8551107f5a6fcfa8ebb11dd268cff86644d5d67ef34778df2336d05e129583e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.11787",
    "kind": "arxiv",
    "version": 2
  }
}